Bit of a tricky one - car cutting out whist driving

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misscleo1
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Bit of a tricky one - car cutting out whist driving

Post by misscleo1 » Fri Oct 02, 2020 12:28 am

Hi everyone,

I'm totally new here and I have come to shamelessly beg for help with my Puma (sorry for the essay).

My car is cutting out whilst driving and nobody can find the issue. I have taken it to 3 of the best garages in my area and we are all stumped.

90% of the time the car works perfectly but occasionally when I am breaking and put my clutch down the car cuts out. It's not even like it stalls...there is no jerking or struggling like a car normally does, it just stops just like when you turn the ignition off. The first light that comes on is the battery light... then eventually the oil can light also comes on.

This has happened in some precarious places (once whilst going round a roundabout and once on busy slip road) so naturally I am worried. It happens on an almost daily basis (although typically never at the mechanic's ).

I have been trying to get to the bottom of this for over a year now and here is what I have had done in the past 10 months but still the issue persists:

Clutch replaced.
Spark plugs and full service.
Mpg sensor cleaned.
Fuel tank replaced.
Fuel pump replaced.
Fuel filter replaced.
2 fuel pump fuses replaced (twice when the car has cut out the fuel pump fuse has blown).
Shock absorbers and bushes replaced.
Engine additive to clean any sludge (added by mechanic).
The car has been on a diagnostic machine for the whole day following it's last blown fuse and the only issue was the fuel pump which has now been replaced.

I usually use the bp ultimate petrol, and rarely let the fuel run too low.

I check the oil / water regularly as it's an old car and has done 144k miles.

The engine occasionally rough idles and when this happens there is no power when accelerating. Also, sometimes when I start it up and go to drive off it kangaroo's to the point I have to pull over turn the car off and start it up again. Car is also having some challenges making it up hills that it used to be able to do with ease.

I occasionally can hear a whirring noise coming from under the car when started up from cold (I assume that is the fuel stop)

Also I have noticed the problem seems to happen more when the car does not do it's abs check at 12 mph.

This is my second Puma (first was wiped out by an artic). I have owned a 1.7 since 2007 so I am sure this isn't driver error.

Any help you could give which I can suggest to the garage would be very much appreciated, I love my little car 😢

Kind regards
Di.
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DOH
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Bit of a tricky one - car cutting out whist driving

Post by DOH » Fri Oct 02, 2020 12:49 pm

Hi Di

There doesn't appear to be any mention of your garages having removed and cleaned the idle control valve. If you or they use the search facility at the top RHS of the page it will reveal more details also I think there is a How to article .
That maybe the cause of cut out , along with possibly split vaccum hoses on the RHS of the inlet manifold .

With regard to lack of power , that sounds like fouled /oiled spark plugs and possibly requiring a set of ignition leads(they typically last 10 years max)
The coil packs are known to break down , but start with Spark Plugs and a new set of leads
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mmc757
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Bit of a tricky one - car cutting out whist driving

Post by mmc757 » Fri Oct 02, 2020 1:33 pm

Agree with all of that .
This is either a bad idle air valve, a vacuum leak, or both.

As far as the plugs go, this era Ford ignition systems can be finicky and its best to replace wires and plugs at the same time. Coil too if you can justify it, just to be sure. Coils tend to show degradation first when they are hot, so if your car is running better in the first five minutes then getting worse once warmed up, that would be an indication of a tired coil pack.

But to be clear, I believe your primary symptoms are an air problem.
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misscleo1
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Joined: Thu Oct 01, 2020 11:37 pm
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Bit of a tricky one - car cutting out whist driving

Post by misscleo1 » Fri Oct 02, 2020 5:51 pm

Thank you both so much! I will ask the garage next time I book it in!

It's a lovely car (aside from a bit of rust) I don't want to give up on it!.

Thanks again

Kind regards
Di
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Wild E. Coyote
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Bit of a tricky one - car cutting out whist driving

Post by Wild E. Coyote » Sat Oct 03, 2020 5:22 pm

Check the clutch switch (it tells PCM you have applied the clutch). It could be either the switch is acting, or the wiring (read connector) problem. It is just on top of the pedal assembly, same as the brake light switch.
Also, with hestitant throttle response clean MAF with some brake cleaner (the wire must be shiney, do NOT touch it, apply the cleaner from a distance, not to break the wire)
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